Sunnybank View Young Offender Institution goes into lockdown when prisoner Esteban escapes overnight. Luke is initially delighted - Esteban used to spray him in the face with weedkiller on gardening duty. Matters take a slight turn however, when prison psychopath Marcel insists that Luke breaks him out. No-nonsense Prison Governor Riley is on the warpath as she tries to get to the bottom of the disappearance. Meanwhile, Creg, who was on duty when the escape took place, desperately needs Dawn to make up an alibi for him. Dawn has other plans, seeing this as a great chance to get her unsettling colleague sacked. Luke's attempts to break Marcel out lead to a shocking discovery in the prison garden. Can Luke keep his dangerous secret from Jason - and is Jason hiding something too?